Adding characters to sanitize_title_with_dashes

Hi all,

A lot of my editors are coping their work from MS Word. Unfortunate MS Word has a strange dash that is used very much in the titles. This dash is replaced by -–- in the sanitize_title_with_dashes() function to generate the permalink.

I’d like to add this dash to the replace list to be sure it’s replaced by a normal -.

PHP identified the dash as chr(37), but if I add the line $title = str_replace(chr(37), '-', $title); to sanitize_title_with_dashes the strange dash is replaced by e2-80-93.

What do I wrong?